Carbon cycle processes: photosynthesis, respiration, decomposition, combustion, carbon sequestration in oceans and sediments, weathering
The carbon cycle moves carbon between stores through six key processes. Each process either releases carbon into the atmosphere or locks it away in living things, rocks, or oceans.
Real World
Chemical weathering of limestone in the Yorkshire Dales slowly removes CO₂ from the atmosphere as rainwater reacts with calcium carbonate rock, sequestering an estimated 0.3 GtC per year globally through this single process.
Exam Focus
For each process, clearly state the carbon source store, the receiving store, and whether the transfer is fast or slow — this secures full marks.
Essay Framework
Use PEEL to structure every paragraph. Tap each step for guidance and an example.
How well did you know this?